[socillion]

Here are some links on Japanese bankruptcy processes taken from IRC discussion.

http://www.jurists.co.jp/en/topics/others_4007.html

http://japantax.org/?p=84

My understanding is that Mtgox is using Minji Saisei.

[patio11]

That understanding is confirmed by, among other places, the subject of the page: [民事再生手続開始の申立てに関するお知らせ].